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Skip search results from other journals and go to results- 2 JMIR mHealth and uHealth
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HR was measured using a sport-style chest-worn HR sensor (Garmin HRM-Pro Plus), and HR information was transmitted via Bluetooth Low Energy and displayed on either a smartphone or smartwatch. The smartphone used was a Google Pixel 4 A, selected due to its low cost and the ability of Android phones to sideload apps, allowing us to install the Connexx app on the smartphone.
JMIR Hum Factors 2025;12:e58715
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More advanced participation involved connecting participants’ Garmin Connect (Garmin Ltd) data, which included sharing data on running distance, running speed, and heart rate during each training or racing session. Participants added their Garmin Connect information at study recruitment. Garmin data were then automatically uploaded every week when the participant was within the study.
JMIR Form Res 2024;8:e39211
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Apple Watch was within ±3% 71% (35/49) of the time, while Fitbit wearables were within ±3% 51% (36/71) of the time and Garmin wearables were within ±3% 49% (23/47) of the time. Despite similar ±3% measurement error rates, Fitbit appeared to underestimate heart rate more than Apple Watch and Garmin.
For energy expenditure estimates, no brand of wearable was within ±3% measurement error more than 13% of the time (Figure 5).
JMIR Mhealth Uhealth 2020;8(9):e18694
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Garmin vivosmart HR+ (Garmin, Olathe, KS, USA): a wrist-based device that monitors heart rate, calories burned, intensity of fitness activities, distance, time, and pace for indoor or outdoor activities.
JMIR Mhealth Uhealth 2019;7(6):e13084
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